Integrated Device Technology, Inc.

Aihua Lee

Gustavo James Mehas

Nicholaus Wayne Smith

Tao Qi

Amit D Bavisi

Chan Young Jeong

Daryl Sugasawara

Xinyun Gu

Tianze Kan

Daryl Jay Sugasawara

Embodiments described herein provide a wireless power transmitter that dynamically adjusts the deadtime to reduce power loss. Specifically, the wireless power transmitter includes a transistor circuit for switching a first voltage at a first node and a second voltage at a second node, and a LC circuit coupled between the first node and the second node. The wireless power transmitter further includes a controller coupled to the transistor circuit. The controller is configured to determine whether either of the first voltage and the second voltage is negative during a deadtime of switching. The controller is configured to increment or decrement the deadtime by an adjustment amount depending on whether negative voltage is detected.

Dynamic deadtime control in a wireless transmission function

In accordance with embodiments of the present invention, a coil design for the transmission of wireless power. In some embodiments, the coil can include a winding with one or more turns of conductive traces mounted on a substrate, wherein the one or more turns include characteristics that enhance operation of the coil. In some embodiments, the winding includes a transmit coil and a receive coil, each coupled to terminals that provide for a transmit functionality and a receive functionality. In some embodiments, the traces are varied in width and/or thickness in order to optimize the inductance and the coil resistance. In some embodiments, parameters of a control circuit coupled to the coil to affect a transmit functionality or a receive functionality can be optimized.

Optimization of transmit and transmit/receive (TRX) coils for wireless transfer of power

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Saratoga, CA, United States of America

Aihua Lee